[R] Error message

Hi fn <- dir(pattern="txt",full.name=T) > fn [1] "./GSM696980_US81503234_252741110209_S01_CGH_107_Sep09_1_1_32914.txt" [2] "./GSM696981_US81503234_252741110209_S01_CGH_107_Sep09_1_2_32916.txt" [3] "./GSM696982_US81503234_252741110209_S01_CGH_107_Sep09_1_3_33021.txt" [4] "./GSM696983_US81503234_252

[R] Question

Hi My name is Rocky and I am trying to use the org.Dm.eg.db library. When I am using the org.Dm.egFLYBASE2EG[fb_ids] it is stopping at a point where it cannot find any value for a given ID such as the following: Error in .checkKeys(value, Rkeys(x), x@ifnotfound) : value for "FBgn0004461" not fou